[go: up one dir, main page]

WO2008008225A2 - Dispositif de sécurité de corde de sauvetage rétractable - Google Patents

Dispositif de sécurité de corde de sauvetage rétractable Download PDF

Info

Publication number
WO2008008225A2
WO2008008225A2 PCT/US2007/015289 US2007015289W WO2008008225A2 WO 2008008225 A2 WO2008008225 A2 WO 2008008225A2 US 2007015289 W US2007015289 W US 2007015289W WO 2008008225 A2 WO2008008225 A2 WO 2008008225A2
Authority
WO
WIPO (PCT)
Prior art keywords
housing
cable
drum
pawl
sprocket
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2007/015289
Other languages
English (en)
Other versions
WO2008008225A3 (fr
Inventor
Eric William Reeves
Wrenn Howard Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIGMA INDUSTRIES LLC
Sigma Ind LLC
Original Assignee
SIGMA INDUSTRIES LLC
Sigma Ind LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SIGMA INDUSTRIES LLC, Sigma Ind LLC filed Critical SIGMA INDUSTRIES LLC
Publication of WO2008008225A2 publication Critical patent/WO2008008225A2/fr
Publication of WO2008008225A3 publication Critical patent/WO2008008225A3/fr
Anticipated expiration legal-status Critical
Priority to US12/319,857 priority Critical patent/US20090178887A1/en
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/04—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion incorporating energy absorbing means
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • A62B1/08—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys
    • A62B1/10—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys mechanically operated

Definitions

  • the present invention relates generally to safety devices and methods for fall protection, and more specifically, to safety devices, in an exemplary embodiment, including retractable lifelines, operable for arresting or decelerating the rapid downward movement of a person or object after a fall.
  • the person may retract or rewind the cord or cable back onto the housing thus shortening the distance between himself and the secure point on the structure. This allows the person working to operate at varying distances from the secure point on the structure and does not limit him to a specific, static spot.
  • a spool assembly having a drum is provided within a housing about which a cord or cable is wound.
  • the lifeline is designed to attach to a secure point on a structure at a predetermined height, the end of the cord or cable attaching to a safety harness worn by a person working at a height either above or below the structure.
  • the drum is operable for rotational movement at a relatively slow rate of speed as the person to which the lifeline is secured causes the cord to extend and/or retract.
  • the lifeline also typically includes a centrifugally actuated brake mechanism which generally consists of one or more pawls mounted inside the housing or on the drum such that the pawls rotate along with the drum as the strap, cord or cable is extended or retracted.
  • the brake mechanism is operable for locking in the event of a fall. Specifically, in the event of a fall, the cord or cable stops extending or slows after the brake mechanism is actuated, thereby preventing injury.
  • the lifeline is also typically provided with a sprocket that is mounted within the housing and is operable for ensuring that the pawls do not contact the cord during use.
  • the sprocket is either stationary or held in frictional engagement with a separate washer or ring that is fixed to the housing, thus preventing the washer or ring from any movement. Thus, while the sprocket may move, its movement is limited to the extent of its frictional relationship to the stationary washer or ring.
  • a spring or other suitable mechanism may be provided which is designed to continually exert a small force on the drum around which the cord or cable is wrapped in the direction of continually winding the cord or cable around the drum. This force serves to take up slack in the cord or cable when the person is moving toward the secure point on the structure, thus decreasing the distance and decreasing the amount of cord or cable needed to maintain continual connection between the person and the secure point in the structure.
  • conventional retraceable lifelines suffer from many shortcomings.
  • conventional retractable lifelines are typically formed by molding and can require numerous components, thus increasing the overall complexity and costs of manufacture.
  • conventional lifelines may inadvertently lock up if the cable is withdrawn too quickly even though a fall is not occurring.
  • conventional lifelines undesirably have power springs attached to the drum/spool by means of a screw, rivet, or other conventional device. This, in turn, requires that the power spring, and the overall size of the lifeline, to be large enough to accommodate a rivet or the like.
  • conventional housings for lifelines are susceptible to damage from external forces due to their structural design.
  • typical retractable lifeline devices have numerous parts/components that are exposed to high levels of potentially damaging forces. Specifically, the frictional forces holding the sprocket and spool assembly in place may cause excessive wear and strain on the other components. Ultimately, this may lead to failure of the device. Also, the pawls in known devices are subject to repetitive striking forces when the brake mechanism is activated and again when the spool is reversed and the pawls are released from the sprocket. By way of another example, known lifelines lack of any warning signal when a lockup is imminent.
  • the present invention is designed to overcome the deficiencies and shortcomings of the devices described above.
  • the present invention is designed to reduce the manufacturing costs and alleviate much of the unnecessary stress on the internal components caused by friction and striking forces.
  • a retraceable lifeline device includes a cable wrapped about a rotatable spool which is, in turn, enclosed within a housing.
  • One end of the cable terminates to a fastening mechanism such as a hook, eye, or the like for attaching to or securely clipping to a safety harness worn by a worker or climber or stationary attachment point.
  • the opposed end is fixed to the spool upon which the cable is wound about.
  • the housing is secured to an elevated surface or the worker (not shown), by a swivel assembly which allows the retractable line to freely rotate while maintaining engagement with the surface.
  • a spool assembly having a spool/drum is supported by an axle.
  • the axle is provided with a slot for receiving a portion of a power spring.
  • a power spring assembly is mounted within the housing and contains the power spring.
  • the inner end of the power spring terminates in an axle hook that fits securely within the slot in the axle.
  • the exterior end of the power spring terminates in a spool hook that fits into a hook relief and a spool slot.
  • the power spring has a band that holds the power spring together.
  • a spring cover attaches to the spool such that the spring cover encases the power spring within the spool by conventional means.
  • the end of the cable that attaches to the hook forms a loop by looping back on itself and being secured by at least one, but preferably two duplex ferrules. Such loop attaches to the hook and protrudes from a cushion.
  • the opposite end of the cable is secured inside the housing to the spool by means of a cable stop.
  • a portion of the cable, the reserve cable is fixed to a spool drum about which the cable winds and unwinds.
  • a clamp secures the reserve cable to the spool drum.
  • the clamp is preferably attached to the spool drum by a clamp screw accessed from the exterior of the spool drum. The clamp screw attaches to a clamp flat.
  • the screw, the screw hole threads, or the clamp flat breaks and allows the reserve cable to be withdrawn from the spool, thus providing additional time to slow the rate of extrusion of the cable from the spool.
  • a cable guide separates the cable from the body of the housing and prevents the cable from rubbing against the housing while it is withdrawn and retracted.
  • the cable guide has a cable guide tab protruding around its perimeter for engagement with the housing. The cable guide tab is held in place, or nested, within the housing by a cable guide mount.
  • pawls Within the spool and adjacent to the power spring are two pawls rotatably mounted on corresponding pawl axles.
  • the pawls are held on the pawl axles by pawl washers and snap rings.
  • the rotation of the pawls are arrested by pawl springs that attach the tip of the pawls.
  • the pawl springs exert enough force on the ends of the pawls to keep their position stationary.
  • Pawls stops are provided to limit the extent of the rotation of the pawls.
  • a pair of spring guards are attached to the axle in opposite relation between the pawls such that the spring guards provide protection to the pawl springs.
  • At least one spring washer Inside the housing is provided at least one spring washer, a friction ring and a sprocket.
  • the pressure plate is held against the washers and secured to the housing by a plurality of pressure plate screws. The pressure of the sprocket against the friction ring creates the drag friction needed to arrest the rotating spool.
  • the sprocket has at least one tooth with a terminal end disposed at a predetermined tooth ramp angle such that the tooth protrudes slightly further toward the pawls.
  • the pawls do not engage the sprocket or contact the tooth.
  • the tips of the pawls will contact the tooth causing an audible click.
  • the housing is strengthened by inclusion of case indents.
  • the case indents are generally comprised of the indent web wall and the indent vertical wall. The case indents follow the contour of the spool.
  • the retractable lifeline is easier to manufacture and maintain.
  • the present invention provides an audible and tactile indicator of impending lockup by utilizing a sprocket with one or more distinct teeth. Normally, the sprocket consists of a plurality of teeth each identical and spaced so the pawls may enter into a root area thereby engaging the sprocket. The present invention alters a tooth on the sprocket to extend slightly beyond the normal teeth.
  • a tooth ramp on the top of this odd tooth is provided at a predetermined tooth ramp angle such that as the pawls begin to rotate on the pawl axles, the end of the pawl will contact the tooth ramp and deflect off. Thus the pawl will strike the tooth ramp but not engage the root area and not engage the sprocket. The pawl contacting the tooth ramp produces an audible signal and a tactile signal which alerts the user that lockup is imminent. In the event of a fall, the velocity of the pawls is such that the pawl will enter the root area and engage the sprocket.
  • the exemplary embodiments of the present invention provide a retractable lifeline that has power springs attached to the drum/spool by means of a band, thereby permitting a smaller size than that of conventional devices. Still further, the exemplary embodiment of the present invention provides a retractable lifeline which has a housing constructed with case indents, thereby providing a stronger and lighter device. Still further, the exemplary embodiments disclose an assembly which includes pawls that are resistant to damage via their connection to the spool assembly.
  • FIG. 1 is an exploded perspective view of a retractable lifeline constructed in accordance with an exemplary embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of a spool assembly of the retractable lifeline of FlG. 1 wherein the orientation of pawls is shown.
  • FIG. 3 is a cross-sectional view of a cable guide of the retractable lifeline of FIG. 1 showing the preferred arrangement of a cable guide mount and a cable guide tab.
  • FIG. 4 is a perspective view of a power spring and its installation within the spool assembly of FIG 1. showing a band and a band hole.
  • FIG. 5 is a perspective view of the spool assembly showing a reserve cable.
  • FIG. 6 is a cross-sectional view of the retractable lifeline with the housing removed.
  • FIG. 7 is a cross-sectional view of an exemplary embodiment of the lockup indicator showing one pawl in normal operating position and one pawl in lockup position with the sprocket.
  • FIG. 8 is a cross-sectional view of another exemplary embodiment of the lockup indicator showing one pawl in normal operating position and one pawl in lockup position with the sprocket.
  • FIG. 9 is a perspective view of a Belleville washer used in the exemplary embodiments of the retractable lifeline of the present invention.
  • FIG. 10 is a cross-sectional view of an exemplary embodiment of the housing of the retractable lifeline of the present invention wherein the housing is constructed with case indents.
  • the present invention provides a retractable lifeline safety device operable for arresting or decelerating the rapid downward movement of a person or object after a fall.
  • the exemplary embodiments of the invention also provide a retractable lifeline that is easier and more cost efficient to manufacture and that signals a user when a lockup is about to occur. Further, the exemplary embodiments of the present invention provide a retractable lifeline warns the wearer of an impending lock up of the cable if the same is being withdrawn too quickly.
  • the exemplary embodiments of the present invention provide a retractable lifeline that has power springs attached to the drum/spool by means of a band eliminating the need for bulky fasteners, thereby permitting a smaller size than that of conventional devices. Still further, the exemplary embodiment of the present invention provide a retractable lifeline which has a housing constructed with case indents, thereby providing a stronger and lighter device. Still further, the exemplary embodiments disclose an assembly which includes pawls that are resistant to damage via their connection to the spool assembly. [0031] Referring now to the drawings, and specifically to FlG. 1, there is shown an exemplary embodiment of a retractable lifeline constructed in accordance with the principles of the current invention and designated generally as 10.
  • the retractable lifeline device 10 is generally includes a spool assembly having a cable 12 wrapped around a rotatable spool or drum 14 which is, in turn, enclosed within a housing 16.
  • the housing 16 is formed by two complimentary halves, 18 and 20, being removably joined together, the first half 18 having a spring which securely attaches to a sprocket contained within the opposed half 20, thus forming an enclosure for the spool 14 and other movable components of the retractable lifeline 10.
  • the spring side portion 18 and the sprocket side portion 20 of the housing 16 are held together by at least one, but preferably a plurality of bolts 22.
  • any suitable means for removably securing the halves 18 and 20 together may be employed, including, but not limited to, screws, ties, seals and the like.
  • One end of the cable 12 terminates to a fastening mechanism 24 such as a hook, eye, or the like for attaching to or securely clipping to a safety harness worn by a worker or climber.
  • the opposed end is fixed to the spool 14 upon which the cable 12 is wound about.
  • the housing 16 is secured to an elevated surface or a person (not shown) by a swivel assembly 26 having a swivel bolt 28 with a swivel base 30, the swivel bolt 28 being rotatably engaged with one or more bearing washers 32 and a swivel body 34.
  • the swivel assembly 26 securely connects to an elevated surface (not shown) and allows the retractable line 10 to freely rotate while maintaining engagement with the surface.
  • the end of the swivel bolt 28 opposite the swivel base 30 has an enlarged portion 36 that is contained within and held by the housing 16, as best shown in FIG. 6, thus securing the retractable line 10 to the swivel assembly 26.
  • the lifeline 10 When the lifeline 10 is secured to an elevated point by the swivel assembly 26, it may twist and rotate about the swivel assembly 26 to reduce any wind of the cable 12 caused by the rotation.
  • the lifeline 10 may also be provided with a plurality of washers or needle/roller type bearings in the swivel assembly 26 operable for reducing the frictional forces which may be exerted on the swivel assembly 26.
  • the wear or damage to the swivel assembly 26, cable 12 or the housing 16 is reduced, thereby extending the useable life of the retractable line 10.
  • the spool 14 is supported by an axle 38 horizontally supported by and spanning the distance between the spring side portion 18 and the sprocket side portion 20 of the housing 16.
  • the axle 38 has a slot 40 running lengthwise from the spring side portion 18 to approximately the middle of the axle 38 for receiving a portion of a power spring 50.
  • the end of the axle 38 nearest the sprocket side portion 20 of the housing 16 has rotation-prevention means, such as a hole 42 through which a pin 44 is inserted.
  • the pin 44 nests securely within a pin slot 46 on the sprocket side portion 20 of the housing 16 such that the pin 44 and axle 38 are prevented from rotating during normal operation when subjected to centrifugal forces as the cable 12 is withdrawn from and retracted into the housing 16.
  • a power spring assembly 48 operable for biasing the spool 14 to rotate in the retractable direction is mounted adjacent to the spring side portion 18 and contains the power spring 50.
  • the inner end of the power spring 50 terminates in an axle hook 52 that fits securely within the slot 40 in the axle 38.
  • the exterior end of the power spring 50 terminates in a spool hook 54 that fits into a hook relief 56 and a spool slot 58.
  • the power spring 50 has a band 60 that holds the power spring 50 together.
  • the band 60 passes around the power spring 50 and through a band hole 62 in the end of the power spring 50 such that the band 60 forms a continuous, unbroken loop surrounding the power spring 50.
  • a spring cover 64 attaches to the spool assembly 14 such that the spring cover 64 encases the power spring 50 within the spool 14 by conventional means 66 such as, for example, screws.
  • the spring cover 64 has a cover hole 68 in its center such that the axle 38 passes through the spring cover 64 and into the spring side portion 18 of the case 16.
  • the spring cover 64 and spool 14 are free to rotate around the axle 38.
  • the use of the band 60 eliminates a stress concentration on the edge of the conventional weld which is used for the power spring. Further, by using the band 60, the power spring may be more compact in size. This is a specific advantage over conventional lifelines which typically use a rivet or screw to hold the band and/or the power spring together.
  • the end of the cable 12 that attaches to the hook 24 forms a loop 70 by looping back on itself and being secured by at least one, but preferably two duplex ferrules 72.
  • Such loop attaches to the hook 24 and protrudes from a cushion 74 that comprises a cylindrical tube encasing the duplex ferrules 72.
  • cushion 74 can absorb shock in the event that the retraction of the cable 12 reaches a velocity that would cause impact damage to the housing 16.
  • the opposite end of the cable 12 is secured inside the housing 16 to the spool 14 by means of a cable stop 76.
  • a portion of the cable 12, the reserve cable 78, is fixed to a spool drum 80 about which the cable 12 winds and unwinds.
  • the cable stop 76 secures the end of the cable 12 to the spool drum 80 creating the terminal end of the reserve cable 78.
  • a clamp 82 secures the reserve cable 78 to the spool drum 80.
  • the clamp's flat portion is oriented to allow easy access to the screw without having to move the cable 12.
  • the cable 12 may be withdrawn up to the point at which the clamp 82 engages the cable 12.
  • the clamp 82 is preferably attached to the spool drum 80 by a clamp screw 84 accessed from the exterior of the spool drum 80.
  • the clamp screw 84 attaches to a clamp flat 86.
  • the clamp flat 86 screw or hole threads, is sized to break off at a predetermined load. Thus, in the event of a fall, the clamp flat 86 breaks and allows the reserve cable 78 to be withdrawn from the spool 14, thus providing additional time to slow the rate of extrusion of the cable 12 from the spool 14 and slowing the rate of descent.
  • the power spring 50 may be sized to have just enough turning capacity to extend and retract only the cable 12 that does not include the reserve cable 78.
  • the clamp 82 releases the reserve cable 78 and it is withdrawn, the spool 14 continues to rotate which will cause the pin to break and allow the spool 14 to release the reserve cable 78 even though the power spring 50 has reached the limit of its extension turns.
  • a cable guide 87 separates the cable 12 from the body of the housing 16 and prevents the cable 12 from rubbing against the housing 16 while it is withdrawn and retracted.
  • the cable guide 87 has a cable guide tab 88 protruding around its perimeter for engagement with the housing 16.
  • the cable guide tab 88 is held in place, or nested, within the housing 16 by a cable guide mount 90.
  • This has the advantage of allowing for molding the cable guide 87 with only one pull direction instead of two pull directions, as required by conventional lifelines.
  • the lifeline 10 may be provided with cable guide mounts extending along a back wall of the housing between the mounts. This would extend the mounts all the way around the cable guide.
  • the centrifugal clutch mechanism includes at least one, but preferably two pawls, pawl A 92 and pawl B 94.
  • pawls A 92 and B 94 are mounted on pawl axle A 96 and pawl axle B 98, respectively.
  • Pawls A 92 and B 94 are held on the pawl axle 96 and 98 by pawl washers 100 and snap rings 102.
  • Pawls A 92 and B 94 are preferably, rotatably mounted on pawl axle A 96 and pawl axle B 98 such that pawl A 92 and pawl B 94 can freely rotate.
  • the rotation of pawl A 92 and pawl B 94 is arrested by pawl springs 104 that attach the tip of pawl A 92 to the end of pawl B 94 and the tip of pawl B 94 to the end of pawl A 92.
  • the pawl springs 104 exert enough force on the ends of pawl A 92 and pawl B 94 to keep pawl A 92 and pawl B 94 in a stationary position, disposed inwardly toward each other and the axle 38.
  • pawl A 92 and pawl B 94 do not rotate about the axles and thus cable 12 is withdrawn and retracted without interruption.
  • a pawl stop A 126 and a pawl stop B 128 are placed adjacent to the axle 38 to limit the extent of the rotation of pawl A 92 and pawl B 94.
  • Pawl stop A 126 limits rotation of pawl A 92 and pawl B 94 inward to prevent the pawl springs 104 from being compressed and to decrease the amount of rotation available for pawl acceleration.
  • pawl stop B 128 prevents pawl A 92 and pawl B 94 from overextending during production when a sprocket may not be present.
  • the pawl stops further prevent damage to the pawl springs from spring surge by limiting the distance the pawl could accelerate.
  • a pair of spring guards 130 are attached to the axle 38 in opposite relation between pawl A 92 and pawl B 94 such that the spring guards 130 provide protection to the pawl springs 104.
  • the spring guards 130 are used to prevent the pawl springs from being replaced without removing the pawls from the pawl axles. Attempting to replace the pawl springs while the pawls are still assembled causes excessive trauma to the pawl springs.
  • a friction ring 106 that nests against the sprocket side portion 20 of the housing 16. Adjacent to the friction ring 106 is a sprocket 108. On the opposite side of the sprocket 108 from the friction ring 106 is at least one of the washers 110 and the pressure plate 112. The pressure plate 112 is held against the washers 110 and secured to the sprocket side portion 20 of the housing 16 by a plurality of pressure plate screws 114. The pressure plate screws 114 securely attach the pressure plate 112 to the sprocket side portion 20 of the housing 16 and prevent the pressure plate 112 from moving.
  • the pressure plate screws 114 are tightened to a predetermined load, thereby pressing the pressure plate 112 into the washers 110, effectively exerting a compression force on the washers 110, the sprocket 108, and the friction ring 106.
  • the friction components of the present invention are what slows and stops descent of a worker or object in the event of a fall.
  • the pressure of the sprocket 108 against the friction ring 106 creates the drag friction needed to arrest the rotating spool 14.
  • Spring loading the sprocket creates a more consistent friction between the sprocket and the friction ring.
  • washer type springs which are approximately the diameter of the sprocket allows for a more compact mechanism. Such washer type springs are known as wave washers and Belleville washers.
  • pawl A 92 and pawl B 94 rotate freely within the friction ring 106, sprocket 108, washers 110, and pressure plate 112. This is shown in FIG. 7 by pawl B 94 and its position in relation to the sprocket 108.
  • a sheave 116 attaches to the spool drum 80 by means of a plurality of sheave screws 118 and prevents the cable 12 from contacting the washers 110, the sprocket 108, and the friction ring 106.
  • the spool 14 will initially rotate at a high rate of speed as the cable 12 is rapidly withdrawn from the retractable line 10.
  • FIG. 9 another exemplary embodiment is available that makes use of at least one washer-type spring, such as a wave washer and/or a Belleville washer 122.
  • the sprocket 108 has a shoulder 124 around its perimeter.
  • the pressure plate 112 rests directly above the shoulder 124 and a -plurality of Belleville washers 122 separates the pressure plate 112 from the shoulder 124.
  • the pressure plate screws 114 are tightened to cause the pressure plate 112 to compress the Belleville washers 122 against the sprocket 108.
  • a third embodiment consists of a Belleville washer with or without another washer that bears directly on the sprocket or on a shoulder of the sprocket.
  • the shoulder of the sprocket would provide a radius and act to spread out the contact area of the Belleville washer on the sprocket.
  • the sprocket 108 has a tooth 132 with a terminal end disposed at a predetermined tooth ramp angle 134 such that the tooth 132 protrudes slightly further toward pawl A 92 and pawl B 94.
  • pawl A 92 and pawl B 94 do not engage the sprocket 108 or contact the tooth 132.
  • the centrifugal force begins to rotate pawl A 92 and pawl B 94 on pawl axle A 96 and pawl axle B 98, the tips of pawl A 92 and pawl B 94 will contact the tooth 132 causing an audible click.
  • the tooth 132 is inclined at the tooth ramp angle 134 such that pawl A 92 and pawl B 94 will bounce off the tooth 132, missing the root area 120 and failing to engage the sprocket 108. As the velocity and centrifugal force increases, pawl A 92 and pawl B 94 will rotate further and will overcome the tooth ramp angle 134 and enter the root area 120 thus engaging the sprocket 108.
  • FIG. 8 another exemplary embodiment of the sprocket 108 is shown.
  • the tooth 132 is provided with a distinct configuration from that illustrated in FIG. 7. Specifically, the tooth 132 is provided with a ramped surfaced having a generally planar tip.
  • the housing 16 is strengthened by inclusion of case indents 136 as seen on FIG 10.
  • the case indents 136 are generally comprised of the indent web wall 138 and the indent vertical wall 140.
  • the case indents 136 follow the contour of the spool 14.
  • These case indents 136 strengthen the housing 16 and add little weight. Further, the case indents 136 do not decrease the clearance for the internal components because they follow the circular outline of the spool 14.
  • the embodiments described above provide advantages over conventional retractable lifelines and associated methods of manufacture. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Lowering Means (AREA)

Abstract

L'invention concerne un dispositif de sécurité de corde de sauvetage rétractable apte à être utilisé à des hauteurs au-dessus du sol. Le dispositif de sécurité est attaché à la structure sur laquelle le travailleur réalise la tâche, et une corde de sauvetage tel qu'un câble est retiré de son boîtier, et a une extrémité qui est attachée à une ceinture ou un harnais porté par le travailleur. Le câble peut être facilement tiré hors du boîtier en réponse au fait que le travailleur se déplace normalement dans l'espace de travail approprié, et le câble est automatiquement tiré par rappel dans le boîtier du dispositif de sécurité lorsque le travailleur se rapproche de celui-ci. Cependant, si le travailleur venait à tomber, un mécanisme de frein à l'intérieur du dispositif de sécurité est automatiquement engagé par un système de roue dentée et de cliquet, arrêtant la descente du travailleur.
PCT/US2007/015289 2006-07-10 2007-07-10 Dispositif de sécurité de corde de sauvetage rétractable Ceased WO2008008225A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/319,857 US20090178887A1 (en) 2006-07-10 2009-01-12 Retractable lifeline safety device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US81967606P 2006-07-10 2006-07-10
US60/819,676 2006-07-10

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/319,857 Continuation US20090178887A1 (en) 2006-07-10 2009-01-12 Retractable lifeline safety device

Publications (2)

Publication Number Publication Date
WO2008008225A2 true WO2008008225A2 (fr) 2008-01-17
WO2008008225A3 WO2008008225A3 (fr) 2008-11-06

Family

ID=38923775

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/015289 Ceased WO2008008225A2 (fr) 2006-07-10 2007-07-10 Dispositif de sécurité de corde de sauvetage rétractable

Country Status (2)

Country Link
US (1) US20090178887A1 (fr)
WO (1) WO2008008225A2 (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011046732A1 (fr) * 2009-10-14 2011-04-21 D B Industries, Inc. Cordage de sécurité auto-rétractable avec partie de réserve
FR2965183A1 (fr) * 2010-09-29 2012-03-30 Tractel Sas Enrouleur de cable de ligne de securite antichute a frein et reserve de cable
US8256574B2 (en) 2010-06-23 2012-09-04 3M Innovative Properties Company Centrifugally-operated apparatus
US8430207B2 (en) 2010-06-23 2013-04-30 3M Innovative Properties Company Preassembled and pretorqued friction brake and method of making a safety device containing such a friction brake
US8430206B2 (en) 2010-06-23 2013-04-30 3M Innovative Properties Company Safety devices comprising a load-bearing composite polymeric housing and a load-bearing anchorage plate
US8469149B2 (en) 2010-06-07 2013-06-25 D B Industries, Llc Self-retracting lifeline with disconnectable lifeline
US8567562B2 (en) 2009-11-02 2013-10-29 B D Industries, LLC Brake assembly for a self-retracting lifeline assembly
WO2013003402A3 (fr) * 2011-06-29 2014-01-16 Key Safety Systems, Inc. Dispositif d'arrêt de chute
GB2507840A (en) * 2012-11-12 2014-05-14 Phonecatcher Ltd Restraining means
CN103889511A (zh) * 2011-10-28 2014-06-25 Db工业股份有限公司 自收回救生绳
US9174073B2 (en) 2013-02-08 2015-11-03 D B Industries, Llc Energy absorber assembly and components thereof
US9199103B2 (en) 2010-05-12 2015-12-01 Msa Technology, Llc Fall protection arrangement
US20160367844A1 (en) * 2015-06-16 2016-12-22 Kai Chieh Yang Anti-Fall Device with Visible Inspection Function
WO2017151349A1 (fr) * 2016-03-02 2017-09-08 Msa Technology, Llc Dispositif de rétraction de ligne comprenant un ensemble amortisseur
EP3278840A1 (fr) * 2016-08-01 2018-02-07 Yoke Industrial Corp. Dispositif anti-chute
WO2022171098A1 (fr) 2021-02-10 2022-08-18 北京欣安诚科技有限公司 Peptide interférent artificiel à petites molécules d'un substrat phosphorylé de dapk1 et son utilisation pharmaceutique
US20220305308A1 (en) * 2021-03-26 2022-09-29 Msa Technology, Llc Two-Part Locking Polymer Hub for Cable Self-Retracting Device
GB2621122A (en) * 2022-07-28 2024-02-07 Latchways Plc Systems and methods for reserving a portion of a lifeline for fall arrest

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2699923A1 (fr) * 2007-10-12 2009-04-16 Latchways Plc Absorbeur d'energie rotatif et systeme anti-chute
GB2468273A (en) * 2009-01-12 2010-09-08 Latchways Plc A fall arrest system comprising a traveller device and a plastically deformable energy absorber
GB2467953B (en) * 2009-02-20 2013-07-17 Latchways Plc Fall arrest system safety device
NZ575464A (en) 2009-03-10 2010-07-30 Holmes Solutions Ltd Improvements in and relating to braking mechanisms
US20110156328A1 (en) * 2009-12-31 2011-06-30 Nicolio Curtis J Integral retainer to retain a spring
CN101862512B (zh) * 2010-06-11 2013-01-02 武汉纺织大学 一种可调节高楼逃生装置
US8973705B2 (en) 2010-09-01 2015-03-10 Climb Tech, Llc Swivel D-ring attachment point
US9409055B1 (en) 2010-10-19 2016-08-09 Cal G. Niemela Tree climbing support
US20120267198A1 (en) * 2011-04-21 2012-10-25 Roy Chowthi Personal fire safety device
DE102011103320A1 (de) * 2011-05-27 2012-11-29 Konecranes Plc Balancer
GB201118597D0 (en) * 2011-10-27 2011-12-07 Latchways Plc Fall arrest system safety device
US9151112B2 (en) * 2012-07-25 2015-10-06 Cal G. Niemela Tree climbing support
US9631428B2 (en) * 2012-07-25 2017-04-25 Cal G. Niemela Tree-mounted supports
US9623269B2 (en) * 2013-03-14 2017-04-18 Black Diamond Equipment, Ltd. Systems for assisted braking belay with a cam-clutch mechanism
NZ619034A (en) 2013-12-16 2015-03-27 Eddy Current Ltd Partnership An assembly to control relative speed of movement between parts
CA2957635A1 (fr) 2014-08-18 2016-02-25 Eddy Current Limited Partnership Mise au point d'une relation cinematique entre des elements
EP3835610B1 (fr) 2014-08-18 2025-03-26 SureWerx USA, Inc. Mise au point d'une relation cinématique entre des éléments
KR102387432B1 (ko) 2014-08-18 2022-04-14 에디 커런트 리미티드 파트너쉽 래칭 장치
WO2016029060A1 (fr) 2014-08-20 2016-02-25 Mcgowan John Lewis Dispositif de freinage par courant de foucault pour systèmes rotatifs
JP7081065B2 (ja) 2014-12-04 2022-06-07 エディ・カーレント・リミテッド・パートナーシップ 渦電流ブレーキ装置、方法、オートビレイ装置およびセルフリトラクティングライフライン装置
MX365838B (es) 2014-12-04 2019-06-17 Eddy Current Lp Transmisiones que incorporan frenado de corriente parasita.
US10774887B2 (en) 2014-12-04 2020-09-15 Eddy Current Limited Partnership Latch activation between members
CN106999736B (zh) 2014-12-04 2021-06-08 涡流有限合伙公司 更改涡流相互作用的方法
AU2015355675C1 (en) 2014-12-04 2021-08-26 Surewerx Usa, Inc. Energy absorbing apparatus
GB2535142B (en) * 2015-01-28 2020-07-29 Latchways Plc Energy absorber and fall arrest system safety device
US10042066B2 (en) * 2015-03-25 2018-08-07 Cgg Services Sas Method and device for passively and automatically winding seismic survey equipment cable
FR3042719B1 (fr) * 2015-10-26 2017-12-01 Vertic Dispositif antichute a rappel automatique et procede de fonctionnement afferent
US9587421B1 (en) 2015-10-28 2017-03-07 Dura Operating, Llc Dual clutch cable control system
JP7044444B2 (ja) 2015-12-18 2022-03-30 エディ・カーレント・リミテッド・パートナーシップ 動力システムのための可変挙動制御機構
US10022570B2 (en) * 2016-05-20 2018-07-17 Bailout, LLC Personal escape device with eddy current braking
US9861841B1 (en) * 2016-08-02 2018-01-09 Yoke Industrial Corp. Fall protection device
JP6793545B2 (ja) * 2016-12-28 2020-12-02 矢崎総業株式会社 巻取装置及び配索構造
GB2565828B (en) * 2017-08-24 2022-05-25 Latchways Plc Case or cradle for a fall arrest device
US10065507B1 (en) * 2017-10-06 2018-09-04 Zip-Flyer, Llc Speed restriction systems using eddy currents
US10333378B2 (en) 2017-10-06 2019-06-25 Zip-Flyer, Llc Speed restriction system using eddy currents
US20200023211A1 (en) * 2018-07-20 2020-01-23 Tian Hsing Chang Fall protection device
ES3042151T3 (en) 2019-09-20 2025-11-18 TruBlue LLC Lock-off descent control systems and devices
ES3025607T3 (en) * 2020-03-18 2025-06-09 TruBlue LLC Line dispensing devices
US11759662B2 (en) * 2020-07-02 2023-09-19 3M Innovative Properties Company Fall-protection apparatus comprising dual-actuatable braking device
US11993477B2 (en) * 2020-08-18 2024-05-28 Checkmate Lifting & Safety Ltd Retractable tool lanyard
US12076594B2 (en) * 2020-11-23 2024-09-03 Yoke Industrial Corp. Fall arrester
TWI762326B (zh) 2021-05-21 2022-04-21 貝加工業有限公司 鼓式煞車防墜器
US12031375B2 (en) * 2022-01-25 2024-07-09 Aaron Bruss Emergency bi-fold door closing prevention system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760910A (en) * 1972-04-14 1973-09-25 A Koshihara Safety device
US5186289A (en) * 1990-10-26 1993-02-16 D B Industries, Inc. Retractable lifeline safety device
US6832886B2 (en) * 2001-07-27 2004-12-21 C. G. Bretting Manufacturing Co., Inc. Apparatus and method for stacking sheets discharged from a starwheel assembly
US7237651B2 (en) * 2002-10-04 2007-07-03 Easydown Corporation Rappelling apparatus
US6832668B2 (en) * 2002-12-20 2004-12-21 American Escape Systems, Inc. Descender apparatus
US7281620B2 (en) * 2003-09-05 2007-10-16 D B Industries, Inc. Self-retracting lifeline

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8226024B2 (en) 2009-10-14 2012-07-24 D B Industries, Inc. Self-retracting lifeline with reserve lifeline portion
WO2011046732A1 (fr) * 2009-10-14 2011-04-21 D B Industries, Inc. Cordage de sécurité auto-rétractable avec partie de réserve
US8567562B2 (en) 2009-11-02 2013-10-29 B D Industries, LLC Brake assembly for a self-retracting lifeline assembly
US9199103B2 (en) 2010-05-12 2015-12-01 Msa Technology, Llc Fall protection arrangement
US8469149B2 (en) 2010-06-07 2013-06-25 D B Industries, Llc Self-retracting lifeline with disconnectable lifeline
US8925687B2 (en) 2010-06-07 2015-01-06 D B Industries, Llc Self-retracting lifeline with disconnectable lifeline
US8256574B2 (en) 2010-06-23 2012-09-04 3M Innovative Properties Company Centrifugally-operated apparatus
US8430208B2 (en) 2010-06-23 2013-04-30 3M Innovative Properties Company Centrifugally-operated apparatus
US8430207B2 (en) 2010-06-23 2013-04-30 3M Innovative Properties Company Preassembled and pretorqued friction brake and method of making a safety device containing such a friction brake
US8430206B2 (en) 2010-06-23 2013-04-30 3M Innovative Properties Company Safety devices comprising a load-bearing composite polymeric housing and a load-bearing anchorage plate
WO2012042180A1 (fr) 2010-09-29 2012-04-05 Tractel Sas Enrouleur de cable de ligne de securite antichute a frein et reserve de cable
FR2965183A1 (fr) * 2010-09-29 2012-03-30 Tractel Sas Enrouleur de cable de ligne de securite antichute a frein et reserve de cable
WO2013003402A3 (fr) * 2011-06-29 2014-01-16 Key Safety Systems, Inc. Dispositif d'arrêt de chute
CN103717265A (zh) * 2011-06-29 2014-04-09 关键安全体系股份有限公司 防坠器
US9242128B2 (en) 2011-06-29 2016-01-26 Key Safety Systems, Inc Fall arrester
US9121462B2 (en) 2011-10-28 2015-09-01 D B Industries, Llc Self-retracting lifeline
US9889322B2 (en) 2011-10-28 2018-02-13 D B Industries, Llc Centrifugal brake assembly
CN103889511A (zh) * 2011-10-28 2014-06-25 Db工业股份有限公司 自收回救生绳
US9151349B2 (en) 2011-10-28 2015-10-06 D B Industries, Llc Centrifugal brake assembly
US9488235B2 (en) 2011-10-28 2016-11-08 D B Industries, Llc Centrifugal brake assembly
US12005276B2 (en) 2011-10-28 2024-06-11 D B Industries, Llc Centrifugal brake assembly
US10792523B2 (en) 2011-10-28 2020-10-06 3M Innovative Properties Company Centrifugal brake assembly
GB2517607A (en) * 2012-11-12 2015-02-25 Phonecatcher Ltd Communication device restraining means and method thereof
CN104918515A (zh) * 2012-11-12 2015-09-16 电话捕手有限公司 通讯装置约制组件及其方法
GB2509487A (en) * 2012-11-12 2014-07-09 Phonecatcher Ltd Restraining means
WO2014072745A1 (fr) * 2012-11-12 2014-05-15 Phonecatcher Limited Moyen de limitation de dispositif de communication et son procédé
GB2507840A (en) * 2012-11-12 2014-05-14 Phonecatcher Ltd Restraining means
US9174073B2 (en) 2013-02-08 2015-11-03 D B Industries, Llc Energy absorber assembly and components thereof
US10016638B2 (en) 2013-02-08 2018-07-10 D B Industries, Llc Energy absorber assembly and components thereof
US20160367844A1 (en) * 2015-06-16 2016-12-22 Kai Chieh Yang Anti-Fall Device with Visible Inspection Function
US10413761B2 (en) 2016-03-02 2019-09-17 Msa Technology, Llc Line retraction device having a damper assembly
WO2017151349A1 (fr) * 2016-03-02 2017-09-08 Msa Technology, Llc Dispositif de rétraction de ligne comprenant un ensemble amortisseur
EP3278840A1 (fr) * 2016-08-01 2018-02-07 Yoke Industrial Corp. Dispositif anti-chute
WO2022171098A1 (fr) 2021-02-10 2022-08-18 北京欣安诚科技有限公司 Peptide interférent artificiel à petites molécules d'un substrat phosphorylé de dapk1 et son utilisation pharmaceutique
US20220305308A1 (en) * 2021-03-26 2022-09-29 Msa Technology, Llc Two-Part Locking Polymer Hub for Cable Self-Retracting Device
GB2621122A (en) * 2022-07-28 2024-02-07 Latchways Plc Systems and methods for reserving a portion of a lifeline for fall arrest
GB2621122B (en) * 2022-07-28 2025-01-15 Latchways Plc Systems and methods for reserving a portion of a lifeline for fall arrest

Also Published As

Publication number Publication date
US20090178887A1 (en) 2009-07-16
WO2008008225A3 (fr) 2008-11-06

Similar Documents

Publication Publication Date Title
US20090178887A1 (en) Retractable lifeline safety device
CA2075978C (fr) Ancrages de securite pour le controle du deroulement d'un cable de manoeuvre
US10322305B2 (en) Retracting lifeline systems for use in tie-back anchoring
CN110022945B (zh) 具有可控回缩速度的防坠落设备
US5722612A (en) Clutch mechanism for use in safety apparatus
JP5819369B2 (ja) エネルギー吸収命綱システム
CA1216831A (fr) Dispositif de securite
US7744063B2 (en) Safety device
EP2771076B1 (fr) Absorbeur d'énergie et dispositif de sécurité de système anti-chute
US6446936B1 (en) Safety apparatus for horizontal lifeline
WO2008139127A1 (fr) Dispositif de sécurité
CA2750506C (fr) Dispositif de securite de systeme d'arret de chute
US20220381299A1 (en) Reduced sized wearable retractable
US3021089A (en) Safety arm for cord reel
CA1315752C (fr) Dispositif de securite antichute
US4998683A (en) Spool and cord type safety device
EP0687482A2 (fr) Dispositif et procédé d'arrêt de chute
AU2006314264B2 (en) Safety device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07810116

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 07810116

Country of ref document: EP

Kind code of ref document: A2